3875
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4992
- Proper Divisor Sum (Aliquot Sum)
- 1117
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3000
- Möbius Function
- 0
- Radical
- 155
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 51
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- A nonlinear recurrence.at n=34A003073
- a(n) = n*(4*n+1).at n=31A007742
- Coordination sequence T1 for Zeolite Code ACO, ASV, EDI, and THO.at n=44A008084
- Coordination sequence T1 for Zeolite Code -WEN.at n=45A009862
- Coordination sequence T7 for Zeolite Code CON.at n=44A009874
- Character of extremal vertex operator algebra of rank 15.5.at n=3A028525
- Duplicate of A008084.at n=44A033598
- Divide primes into groups with prime(n) elements and add together.at n=6A034958
- Number of partitions of n with equal number of parts congruent to each of 0, 1 and 4 (mod 5).at n=50A035574
- Number of partitions of n into parts not of the form 23k, 23k+2 or 23k-2. Also number of partitions with 1 part of size 1 and differences between parts at distance 10 are greater than 1.at n=33A035990
- Sums of 3 distinct powers of 5.at n=19A038475
- Denominators of continued fraction convergents to sqrt(246).at n=8A041461
- Numbers whose base-5 representation contains exactly three 0's and three 1's.at n=9A045172
- Numbers k that divide 7^k + 3^k.at n=18A045586
- Number of nonempty subsets of {1,2,...,n} in which exactly 1/2 of the elements are <= sqrt(n).at n=18A048093
- Starting positions of strings of 2 6's in the decimal expansion of Pi.at n=31A050245
- Consider all integer triples (i,j,k), j >= k > 0, with binomial(i+2,3)=j^3+k^3, ordered by increasing i; sequence gives k values.at n=13A054207
- a(0) = 1; a(n) = Sum_{0 <= k < n and gcd(k, n) != 1} a(k).at n=24A054251
- a(n+1) = a(n) converted to base 10 from base 15.at n=11A055986
- Indices of primes in sequence defined by A(0) = 33, A(n) = 10*A(n-1) + 43 for n > 0.at n=9A056255